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Email Is Older Than the Web — Ray Tomlinson Invented It in 1971
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Email Is Older Than the Web — Ray Tomlinson Invented It in 1971

March 28, 2026 · 4 min read

The Fact

Email predates the World Wide Web — the first email was sent by Ray Tomlinson in 1971 over ARPANET.

In late 1971, Ray Tomlinson, an engineer at BBN Technologies in Cambridge, Massachusetts, sat down with a specific problem. He was working on ARPANET, the early network that would eventually become the internet, and had been developing two separate programs: one that allowed users to leave messages for each other on the same computer (like leaving a note in a shared mailbox), and one that allowed files to be transferred between different computers on the network. He wondered: could you combine these two capabilities to send a message from one user's account on one computer to a different user's account on a completely different computer?

The answer, it turned out, was yes — and implementing it took about an afternoon.

Choosing the @ Symbol

The technical challenge was relatively straightforward once Tomlinson had the concept: modify the file transfer program to append a message to a specific user's mailbox file on a remote computer. What required more thought was the addressing convention. How would the system know, from a single address string, both who to send the message to and which computer to send it to?

Tomlinson's solution was to separate the user name from the host computer name with a symbol. He needed a character that was already on keyboards, was not commonly used in names or text, and would clearly separate the two parts of the address. He looked at his Model 33 Teletype keyboard and chose the @ sign — the commercial "at" symbol used in invoices to mean "at the rate of."

The format user@host became the standard format for email addresses worldwide. Decades later, when the World Wide Web enabled global communication for billions of people, that format was adopted without modification. The @ symbol, previously an obscure commercial notation rarely used outside accounting documents, became one of the most recognizable and universally used typographic marks in the world.

What the First Email Said

Tomlinson has said that he does not remember the exact content of the first email he sent, only that it was something along the lines of "QWERTYUIOP" or another random keyboard string — a test message sent to himself between two computers sitting side by side in the same room, connected via ARPANET. There was no profound content. The first email was functionally equivalent to testing whether a newly installed appliance was properly wired.

The significance was not in the message but in the demonstration: a text message could now travel from one user's account to another user's account on a completely different computer, anywhere on the network, without any prior coordination between the two machines. The sender did not need to know where the recipient's computer was physically located or what kind of machine it was. The addressing convention handled all of that.

From ARPANET Novelty to Universal Communication

Email's adoption on ARPANET was rapid. Within a year or two of Tomlinson's invention, email had become the dominant use of ARPANET bandwidth — a result that surprised many of the network's designers, who had conceived it primarily as a research tool for sharing scientific data and remote computer access. The demand for person-to-person electronic messaging turned out to be far greater than anyone had anticipated.

By the 1990s, email had expanded beyond research institutions to businesses, and by the late 1990s, web-based email services like Hotmail (1996) and Yahoo Mail (1997), followed by Gmail (2004), made email accessible to anyone with an internet connection. The invention that Tomlinson made in 1971 to solve a narrow technical problem on a small research network now carries an estimated 347 billion messages per day across a global infrastructure involving billions of users, all still using the user@host addressing convention he devised on an afternoon in Cambridge more than 50 years ago.

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FactOTD Editorial Team

Published March 28, 2026 · 4 min read

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